[package] 6in4, 6to4: prevent starting the tunnel if kmod-sit is not yet loaded ...
[openwrt.git] / target / linux / ubicom32 / files / drivers / usb / musb / ubi32_usb.c
1 /*
2 * drivers/usb/musb/ubi32_usb.c
3 * Ubicom32 usb controller driver.
4 *
5 * (C) Copyright 2009, Ubicom, Inc.
6 * Copyright (C) 2005-2006 by Texas Instruments
7 *
8 * Derived from the Texas Instruments Inventra Controller Driver for Linux.
9 *
10 * This file is part of the Ubicom32 Linux Kernel Port.
11 *
12 * The Ubicom32 Linux Kernel Port is free software: you can redistribute
13 * it and/or modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, either version 2 of the
15 * License, or (at your option) any later version.
16 *
17 * The Ubicom32 Linux Kernel Port is distributed in the hope that it
18 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
19 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
20 * the GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with the Ubicom32 Linux Kernel Port. If not,
24 * see <http://www.gnu.org/licenses/>.
25 *
26 * Ubicom32 implementation derived from (with many thanks):
27 * arch/m68knommu
28 * arch/blackfin
29 * arch/parisc
30 */
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/sched.h>
34 #include <linux/slab.h>
35 #include <linux/init.h>
36 #include <linux/list.h>
37 #include <linux/clk.h>
38 #include <linux/io.h>
39
40 #include <asm/io.h>
41 #include <asm/ip5000.h>
42 #include "musb_core.h"
43
44 void musb_platform_enable(struct musb *musb)
45 {
46 }
47 void musb_platform_disable(struct musb *musb)
48 {
49 }
50
51 int musb_platform_set_mode(struct musb *musb, u8 musb_mode) {
52 return 0;
53 }
54
55 static void ip5k_usb_hcd_vbus_power(struct musb *musb, int is_on, int sleeping)
56 {
57 }
58
59 static void ip5k_usb_hcd_set_vbus(struct musb *musb, int is_on)
60 {
61 u8 devctl;
62 /* HDRC controls CPEN, but beware current surges during device
63 * connect. They can trigger transient overcurrent conditions
64 * that must be ignored.
65 */
66
67 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
68
69 if (is_on) {
70 musb->is_active = 1;
71 musb->xceiv.default_a = 1;
72 musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
73 devctl |= MUSB_DEVCTL_SESSION;
74
75 MUSB_HST_MODE(musb);
76 } else {
77 musb->is_active = 0;
78
79 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
80 * jumping right to B_IDLE...
81 */
82
83 musb->xceiv.default_a = 0;
84 musb->xceiv.state = OTG_STATE_B_IDLE;
85 devctl &= ~MUSB_DEVCTL_SESSION;
86
87 MUSB_DEV_MODE(musb);
88 }
89 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
90
91 DBG(1, "VBUS %s, devctl %02x "
92 /* otg %3x conf %08x prcm %08x */ "\n",
93 otg_state_string(musb),
94 musb_readb(musb->mregs, MUSB_DEVCTL));
95 }
96 static int ip5k_usb_hcd_set_power(struct otg_transceiver *x, unsigned mA)
97 {
98 return 0;
99 }
100
101 static int musb_platform_resume(struct musb *musb);
102
103 int __init musb_platform_init(struct musb *musb)
104 {
105
106 #ifdef CONFIG_UBICOM32_V4
107 u32_t chip_id;
108 asm volatile (
109 "move.4 %0, CHIP_ID \n\t"
110 : "=r" (chip_id)
111 );
112 if (chip_id == 0x30001) {
113 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 30);
114 udelay(1);
115 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 31);
116 } else {
117 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 17);
118 udelay(1);
119 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 14);
120 }
121 #endif
122
123 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_CFG)) |= ((1 << 14) | (1 <<15));
124
125 /* The i-clk is AUTO gated. Hence there is no need
126 * to disable it until the driver is shutdown */
127
128 clk_enable(musb->clock);
129 musb_platform_resume(musb);
130
131 ip5k_usb_hcd_vbus_power(musb, musb->board_mode == MUSB_HOST, 1);
132
133 if (is_host_enabled(musb))
134 musb->board_set_vbus = ip5k_usb_hcd_set_vbus;
135 if (is_peripheral_enabled(musb))
136 musb->xceiv.set_power = ip5k_usb_hcd_set_power;
137
138 return 0;
139 }
140
141
142 int musb_platform_suspend(struct musb *musb)
143 {
144 return 0;
145 }
146 int musb_platform_resume(struct musb *musb)
147 {
148 return 0;
149 }
150
151 int musb_platform_exit(struct musb *musb)
152 {
153 ip5k_usb_hcd_vbus_power(musb, 0 /*off*/, 1);
154 musb_platform_suspend(musb);
155 return 0;
156 }
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